409 stainless steel tube is especially useful for applications where oxidation or corrosion protection beyond the capacity of carbon steel and some coated steels is needed. Current applications include automotive and truck exhaust systems, including tubular manifolds; agricultural spreaders, gas turbine exhaust silencers, and heat exchangers. It’s also useful for “difficult-to-form” hardware such as fuel fillers. 409 is a titanium stabilized ferritic stainless steel.
Although regarded as a general-purpose chromium stainless steel tube, the primary application for Grade 409 is automotive exhaust systems. Its applications are those where appearance is a secondary consideration to mechanical properties and corrosion resistance and where some weldability is required.
Need help selecting the right tube?Ask our experts